Control mechanism for pipe cutters and threaders



Feb. 19, 1929. 1,702,336

G. M. CAUSEY ET AL CONTROL MECHANISM FOR PIPE CUTTERS AND THREADERS Original Filed March l. 1926 4 Sheets-Sheet l INVENTOR.

ATTO R N EY Feb. 19, 1929.

G. M. CAUSEY El" AL CONTROL MEGHANISM FOR PIPE CUTTERS AND THREADERS Y 4 Sheets-Sheet 2 Original Filed March l, 1926 ATTORNY Feb. 19, 1929.

G. M. CAUSEY ET AL CONTROL MBCHANISM FOR PIPE cUTTERs AND THREADERS Original Filed March 1. 1926 4 Sheets-Sheet INVENTORS nronnsv Feb. 19, 1929.

G. M CAUSEY ET AL CONTROL MECHANISM FOR PIPE CUTTERS AND `'IHHEADIIRS 4 Sheets-Sheet 4 Original Filed March l, 1926 INVENTOH ATTO R N EY Patented Feb. 19, 1929.

UNITED STATES PATENT orifice.

GUY M. CAUSEY, OF SALEM, OREGON, AND MONROE E. MILLER, OF 'WABHIN'GTON',

DISTRICT F COLUMBIA; SAID MILLER ASSIGNOR TO SAID CAUSEY.

CONTROL MECHANISM :FOR` PIPE CUTTERS AND THREADERS.

Original application led March 1, 1926, `Serial No. 91,524. Divided and this application led July 10,

The present invention relates to control mechanism for pipe cutters and threaders and other machines, and this application is a division of application tiled March 1, 1926, Serial No.. 91,5224.

The object of the invention is the provision of a machine, such as for cutting;r and thread ing' pipes, operated by an electric motor or other prime mover so as to eliminate manual etiort 'tor cutting and tlireruling` the pipes, and the machine beingV automatic in operation a'lter the parts have been properly positioned and the operation started. Thus, when a pipe is positioned and clamped the pipe cutter may be started, such as by touching a push button, and will complete its operation and reset itself, thereby cutting oil' the pipe at the predetermined point. Then, the machine may be controlled to position the parts ior the operation oi' the pipe threader, and said threader may be started into operation and will complete its operation and reset itself.v Therefore, theonly attention required on the part of the operator is to insert and rl-.imp the pipe, with the pipe cutter in place, then start the pipe cutter, and after the pipe has been cut, to position the pipe threader lor operation and start the operation thereof. This leaves the operator free to perform other Work during the times that the pipe is being` cut and threaded.

Another object is the provision of novel controlling means for the actuating` means whereby the limits of movement of the cutting and threading means may be changed, ior pipes ot different diameters and for screw-threadingr the pipes it'or different distances.

Although the control mechanismis illustratcd and described in connection with a pipe cutting` and threadingr machine, it will be. ainfiarent that such mechanism will be used for other machines Jfor which it ap` propriate.

Vlfith the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described and claimed, it beingr understood that changes can be made within Serial No. 121,677.

the scope of what is claimed, Without departing;` from the spirit ofthe invention.

lhe invention is illustrated in the accompanying' drawings, wherein- Figure 1 is a rear view of the machine, 55

showingr the casing or body in intermediate position, and illustrating the cuttingland threading positions thereof in dotted lines. Fig. 2 is a horizontal section on thelne 2-2 ot' Fig. 1, portions being shown in plan. 60

Fig. 3 is a vertical transverse section on the line 3-3 of F ig. 2 looking rearwardly.

Fig. 4 is a vertical transverse section on the line 4 4 of Fig. 2 lookingr forwardly.

Fig. 5 is a vertical longitudinal section on 05 the line 5-5 of F ig. 1, portions being shown in elevation.

Fig. 6 is a section on the line 66 of Fig. 5 illustrating the pipe clamp or vise.

Fig. 7 `is a horizontal section on the line 70 7--7 of Fig. 4, portions being shown in plan.

Fig. 8 is a top view illustrating the controlling means.

Fig. 9 is a sectional detail on the line 9-9 of F ig. 2. i

Fig. 10 is a diagrammatical view to illustrate the electrical circuits and devices of the controlling means.

In carrying out the invention there is provided a casingr or body 11 having the removso able back Wall 12 for access to the interior parts, and said casin is mounted for oscillation on a horizonta longitudinal shaft 13 which, as shown, is the armature shaft of an electric motor 14 that furnishes the power 85 to operate the machine. Said motor isse` cured Within the casing 11. The protrudingr iront and rear terminals of the shaft 13 are journaled in bearings or pedestals 15 and 1G,

respectively, rising from a base 17 which may ao p be supported on a bench, table or other suits able support. Y y

The front pedestal 15 has-an upwardly extending bracket 18 carrying the pipe clamp or vise 19 to receive and hold the pipe or rod 95 20 in the proper position for the operation ot the cutter and threader on the rear portion ot the pipe. The clamp 19 may be of any suitable construction. As shown, it cornprises a yoke 21 having upper and lower secf 1GO tions hingedly connected at one side, t s at 22, with the lower section secured on or in tegral With the hrachet 18. The sections oi the yoke are detaehahly connected at the opposite side hy a latch or hook Clamping blocks 24 and 25 are slidahle in the lower and upper sections of the yoke rrspeo tively, and a screw 2G is threaded through the upper portion olf the yoke and is swivelled to the upper block 25 for raising and lowering it. The hloelis 24 and have toothed or s-irrz 'ted V-shaped notches or recesses 2T to receive and grip the pipe or rod Q0 so as Ato conter said pipe and secure it in the proper position lor the operation thereon oil: the pipe cutter and the threadrr. The blocks 2%-, and 25, especially the hloclr 2l, ina.;v he used interchangeably with other hlocks lier di'l'- l'f'erent sizes or pipes, and the several pairs et blocks may have. notches or recesses 2T of dil'lerent sizes it'or pipes ot diliereut diaineters. ln `this way, quick adjustments inay he iiiade it'or pipes or' di'l'eren diameters and such pipes will all he accommodated with their axes in the saine line so as to properly register with the pipe cutter and the pipe thro-ader. The pipe clamp oi vise may also he used for holding,` a pipe or other ohjeet to he operated on for other purposes than cutiiig and threading;v hy the present machine, inasinuch as such clamp or vise ina),Y he liano); for other purposes and may eliminate the necessity for a separate pipe clanip or vise.

The pipe cutter 28 includes a tubular shaft 29 of sullicient diameter to receive the largest diameter of pipe for which the machine is intended, and the rear terminal ot the sl aft 2S) is journaled in a hearing` 30 with which the haelt Wall 12 is provided. A sleeve 3l is rotatable on the shaft Q9 near the forward end thereof and is `iournaled tor rotation in a hearing 32 with which the front Vall ot the asing ll is provided. The .sleeve 3l has a dish 33 at its forward ord provided with a forwardly extendin rini or flange 34tagainst rl'hiel a dish or plato 235 is drlarhahh; secured and provided with a contal oiiiciliiip rop;- islerino; with the opening; ol the shalt 29. 'lhe dA or plate la has radial grooif'es 36 iii ils rear or inner side, in which cutter hits or nirinhers Sli' are slidahle to he projected iiilo and retrarted ilroin the opening; el `the shall Tl and cutter head. The inner ends ot the hits ill' are sharpened so as to rut the pipe. el'lirirnl ly. and the hits Si' are aumnatiallji projected inwardly and retracted outvaai'dly h5' the relative rotation oli the shalt E25) and sleeve 8l. For this purpose, the shalt Q9 is provided its it'oiward enf. rl/ith a dish 8S hetireeu he d and and rotatable relatively to the disks and Said disl: 3S has spirally extending' slots 4;() receiving; pins or lugs 39 on the bits Si', whereby 'the relative rotation of the dish 3S with rei" to the disks 33 and will slide the hi 's the sli alt.

inrvardli7 and outwardly. The cutter head comprising the disks 38, l5 and 3S and his Si" is located in front oi' they casing` ll with the axis ol said head and shat't 2S) horizontal and parallel With the shaft 13.

Gear Wheels and l2 oli sligh tiff dillcreni diameters are secured. on the shaft 2 and sleeve 3l Within lthe casing)v ll and iiiesh with a douhle diainetei'ed pinion 43 inounted for relation. in the raising, in order that lthe sleeve :Ell vill rotate at a slightly dill'ereiit speed than the shaft 29, so as to project and retract the hits 3T when the shaft 25) rotated in opposite directions. A Worin Wheel, lil is secured on the slia'tt 29 adjacent to Vthe hach wall lf2 :for rotatingl said shaft as Will hereinaifter more fully appear.

The pipe thrcadei.' lo is disposed with its anis parallel to the airis ol the pipe cutter and the axis oi the` sha'lt 12B, with the pipe critter and pipe thriader disposed side hy side. The pipe threadrr inrhides a holler.v cylindrical screw lo having; the intiiriied toothed portions" eli' at its lorvard end rohstitu'ing the threadingl die. ',lfhe scierlY itl is rcreirlthreaded Within a slew? fill that is .tilted roniovally in a hearing' Lil) with which the casing' 1l is termed, said sleeve itl being readily slid mrwardly into the hearing' lil, and said healing carrying a set screw Sill or other nieans `for clainiiinp` the sleeve iii pla The threading die l? may he used, interol angeahly with other dies tor pipes ot ditrereiit diameters. Thus, scre haif'ing dies or dillferent sizes may he used interchangeably, and each screoT has a sleeve l-tl, With `the screw thread hetrfeen the screw and sleeve or the saine pitch as the thread et the die ll-JT. Thus, when the screw Lit@ is rotated in the sleeve it will he projected and retracted so that the die il? will more groperlj/f on the pipe.

ln order to rotate the screw M is provided at its rear end with an aperture 5l ot square. or non-circular' :iii slidalily receiving` the lorward teriiiii oit a shalt oil, said terminal ai? heine' of square or mourir-- cular :ross-section so that the screw Il will rol al i c with the shalt, and perniittiiigif the screw to more vtorn'ardly and rern'wardly ou The shalt 53 is ionrnaled ia a with haii-iupfffli the hach wall 'l2 ol the casio is proridro, aud a worm ulirrl rorrrspiaidingr with the worin whos-l il. is cured on the shalft o?) lielurrn lla serra' ll', and wall rEhe in it-fraliro rerum-lion helwceu the inotor and the cutter and threader includes irornis o@ aud 54" helow and meshingl with the worin Wheels :il and wi, respefrlireljr. and si cured on the corresponding alininl shafts 5l) and journaled in the casing' il hero r tho irorii'i Wheels. Clutch nienihers el) and lll are slidahle oli and rotatable with the respectivo salts a@ and of) and are eiigageahle With Vthe lil) clutch hub 62 of a worm wheel 63 ournaled in the casing between the shafts 58 and 59. Said worm wheel 63 engages a worm 64 secured on the drive shat't 13. llVlien the clutch members and 61 are moved into engagement with the clutch hub 62, the shafts 58 and i 59 are connected with the motor 14 for driving the pipe cutter and pipe thrcader, respectively.

Adjustable stops, such as screws 65, are carried b v the hase 17 for the contact of the bottom ot' lthe casing 11 `in order to limit the oscillatory movement ot said casing' when swung to cutting` and threading positions.

The casing 11 is slidable forwardly and rearwardly on the base, the shaft 13 being slidable in the pedestals 15 and 16, and an upwardlyy extcndiru;r hand lever 66 is tulcrumed, as at 6T, to the rear wall 12 of the casing adjacent to the shaft 13, and has a spherical rollcr 68 at its lower end bearing' forwardl)7 against an abutment 69 opstanding;r from the base. The rear wall 1Q has rearwardly extending,y lugs or arms 70 between `which the lever `66 extends. in order that the casing will oscillate transversely with the lever. A coiled spring 71 surrounds the shaft 13 and is contined between the pedestal 16 and the casing, to normally move the casing forwardly. By swinging the lever 66 rearwardly, the casing' is shifted rearwardly.

The rear terminal ot the shaft 13 has a square or non-circular portion 72 for the engagement of a crank or other implement for manuallyT operating the machine, when desired, such as when the electric current for the motor tails.

The clutches for connecting the cutter and threader with the motor are controlled electrically as shown. Thus, as seen in Fig. 7, levers 73 and 74 are fulcrumed within the casing 11 and have suitable connections with the clutch members 60 and 61, respectively, and the cores T5 and T6 of solenoids TT and T8, respectively. are connected with said levers. lllhen said solt-inoids or electromag nets are energized the levers are swung to move the clutch members into `connection with the clutch hub The automatic controlling means for the motor 111 and clutch opivrators. shown in lili 8 and 10. coinju'ise the control wheels S0 and S1 for the Vbipe cutter and pi pc threader, respectively. Said wheels are operatively connected with the respective actuating means tor the cutter and threader. As shown, the wheels V and 81 are worm wheels and engage worms S2 to which are secured sprocket wheels S3, and sprocket chains 84 connect the wheels 83 with sprocket wheels 85 secured on the shafts 58 and 59. The wheels 80 and 81 are located on the top ot the casing 11, and the chains 84 extend downwardlyv from the sprocket wheels 83 to the sprocket Wheels 85.

T he gear ratio between the shafts 58 and 59 and the wheels `80 and 81, respectively, is such that for the maximum movements of the pipe cutter and pipe threacler the control wheels 8() and 81 will rotate less than a com plete revolution, and the limits of movement ot' the pipe cutter and pipe threader may `loe regulated, to adjust the movement of the pipe cutter to the diameter of the `pipe being cut,

Vand to adjust the movement of the pipe 'thrcader according to the length of the portion ot' the pipe to he threaded.`

Cil

Arms 86 and 87 are mounted to turn on the Y pivots or axles of the wheels `80 and 81, respectively, and the wheels have annular series of apertures or sockets 88. Pins or pegs 92 and 93 are engageable in the apertures 88 of the pipe cutter control wheel 80, and similar pins or pegs 90 and 91 are engageable in the `apertures 88 of the pipe threader control wheel 81. By adjustingr the pegs `90, 91, 92 and 93 it is possible to regulate the opposite limits ot movement of the pipe cutter and armature ot the motor 14, and the motor is Y stopped when the lever 95 is in its normal intermediate or neutral position. Then the lever 95 is attracted by the energized magnet 96, the motor will operate in one direction, whereas when the armature Vlever `95 is at tracted by the energized magnet 9T, the motor is operated in the opposite direction.

Push buttons or other suitable switches and 101 are carried by the casingr `11 for startingl the operation of the pipe cutter and pipe threader, respectively.` The remaininglr elements of the electrical control will be dclscribed in connection with the operation of the machine.

In operation, when a pipe to be cut, `the casing;r 11 swungr to cuttingr position (has seen in Fig. 1, which will lering;r the pipe cutter Q9 into registration and alinement with the clamp or vise 19.` The pipe is then inserted in the clamp and cutter, and may extcml completel'tY through the shaft Q9. The cutting' bits or members 3T are normally retracted so as not to interfere with theintroduction of the pipe into the cutter. The operator then touches the push button switch 100, which will start the operation of the pipe cutter, and no further attention on the part of the operator is required until theoperation has been completed. W'hen the switch 100 is closed this completes a circuit includlll!) innr the conductor 98, a. conductor 102, switch 100, a conductor 103, an electromagnet 104 i conductor 105, solenoid 177, a (xm/:luchar 1 ipo 80 11111-1115Y 1o be C111.

, which 1011 on 70 119111 88, co1111ots 1111111 511e :11111 8G :11111 11o opor- 111111 resetnng 11110 T11@ 11111- of p 111111 s111111. 251 11'111 111111111111@ S 11e 111111111111 111e rear 1.11111 1111.011011 l1 from 9 1111111 T. :111

11 11) 1s to 111 011111111111111 111 111 e peg 1111111 130511 11g 111@l 111111111' M 11 111111111611 111e motor 7 g 11111011 or rods 11o 1116065 11111' 0111111 1111111' 1o o1' 111 111e, shaft A pe, 111111 1111 1011111' j to 11111 111111 011511111;

o 111:11v 11o 1'1 touches '111111 1111.111

s boing returned to 17111111 the 1111s 37 111111@ 1101111 fj 21 1.1111813 of 1111111 s 11111 p1 p11 1111150 co o 12011111111 o1 1c 111e 11.111g11et 91' 3111.1 @roby S '511e c1.

1o 111111 1; 1o 1133A 1o 11 11 1111@ plpo, '51

1'1 111:1:111s1v11111 11 11112 rod.

11111111 111H1t1'1o 1 11110111511 111e 1on1 to S1111 111.11; 11111 1:11111111121111 155, 11 c1 :s11'11o11 1.01. 11 1111111111.

011111.11' for :1.11111 1o 11111111 the Switch 113. T 111s 111111 111e retracted fro 11111131, 111 1111111'11rd13', 1191151 from 11111 o f1 Kl.

,11e 1111191111111 of 1' :111111111 1111, so 11 111111111 the 11.11111 out 111111 11113111 hs 1 1191515111@ 11101101' lil- Wlh .1 1'o1'11t11 111011* Ween 111e 111 )111 Therefore, as the r 1&1'

pipe 01111111- 111 1111i1g11e11v 1041 00111101 107 W111o11 1S 111111111 T151@ pe to ro 1111 .111er 1111QCL111 1 l11er 1 f 111.1 1111s 1111.111 111111 S11/'111155 111e 11111 11o 151111111 o 111011@ 111e c 111.111 force J51113 111115 3T 111 gage 111111 111; 51111111111 t 11111,` with 1111s C111 '7 111111113; kep 611.1111111 be as seen 111 Flgs. S and l0 99. iore @nerglzod t 11110 en f1 51111111 Q9 211111 51eme 3l.

911 1o oo Conductors 98 1, rot

Y' 2111111515@ 40 pag 93 c0111 1 111.0 1 1007 1110, switch .10Tn 111111511011 l1 11111011 L1111, :1re 1.1111111111 1111111 thereby co 5 1110101".

switch 1S dosed 11111211 f' argued by 111e C1051. r

F11@ SW.

magnet 11101165 1311 1011er (1 111111 Shaft 219. 111111, 131111111g51 1.11111 1111111' 'w11 1 s11s211131 111e S11.

Cutter 11111111 1011111115 1511.@ 1111.1 :311 11101@ 111. 111; 111e s1 bein 3; 111111111118() 11 11am? ro peg 92 away from 111e 211111 811 11 91,11. 111111111111111' 1118 1111111'ff1I/J11; 11111 111110911 1:1111. 11111111 morso 1111,

117111111 111e sw?? so 11o close s1 s111111: 1.1L

Vl11111- 1111 @a s 1.1111111111n 121111111111 i1; f. t1 1 mm1ml (111152K 11.1, (-.1(1111 001111116101' 122. 11

TYR/1 E111-111g; 1f ting 1110 11111111111 of the p1 trol 1111111111 101111195 c1110- completing an electric circuit including the conductor 98, conductor 108, magnet 9G, conductor 124, switch 125, conductor 126, an electromagnet 127 controlling switch 123, conductor 119, solenoid 78, conductor 120 and conductor 99. The switch 193 is therefore opened to open the circuit ot' the magnet 9T, but the solenoid 78 is Vkept energized to hold the corresponding clutch closed. The magnet 96 is energized to reverse the switch 94 and motor 14, therebyT rotating the shaft 53 and screw 46 in the opposite direction, in order to retract the threading die 47 and reset the pipe threader. During such return movement the wheel 81 rotates clockwise, as seen in Figs. 8 and 10, thereby moving the peg 91 awa)7 from and the peg toward the arm Si', said arm 87 remaining in position with the switch closed. W hen the pipe threader has been returned to initial or normal position, the peg 90 contacts ,with and swings the arm 8T to open the switch 125, thereby deenergizing the magnet 96 and solenoid 7S, to stop the motor 14 and open the clutch between the motor and pipe threader. It desired, the machine may be used exclusively for threading pipes by leaving the casing 11 in threading position and replacing the pipes in the clamp or vise 19. B v changing the position of the peg 91 it is possible to control the longitudinal movement ot the screw 46 and threading die 47 to cut the thread on the pipe to dit'- erent distances from the end of the pipe, within the limit or forward movement ot' the screw 46 when projected from the casing.

The pipe cutter will operate on pipes of different diameters, and the sleeve 48 may be readily withdrawn from the casing to be substituted b v a sleeve containing a screw and die p for pipes oi' dili'erent diameter, and the clamp or vise 19 may also be quickly adjusted for pipes oil dili'ercnt diameter. p

The gears and parts within the casing 11 may run in oil, and the bits 37 and cutting die 4T may be supplied with oil to facilitate the cutting and threading of the pipe and to reduce i'riction and heat. 4

As shown, the control wheels 8O and S1, motor reversing switch 94, and magnets 96, 97, 104, 115,118 and 127 are located on the top of the casing 11 within a surrounding flange 12S, and a cover 129 seats on said flange over said parts and is hinged, as at 130, so that it maj,`- be swung open for adjusting the pegs 90, 91, 92 and 93.

Having thus described the invention, what is claimed as new is Il. ln a machine of the character described,

means mo fable in one direction to operate on an object and having a reverse movement to reset said means, actuating means operably connected with the lirstnamed means, control means operated by the actuating means at the opposite limits ot' movement of the firstnamed means, and electromagnetic means controlling the actuating means and controlled by .said control means to automatically reverse the tirstnamed means after a predetermined operation on the object and `to stop said tirstnamedmcans when it is reset.

2. In a machine of the characterdescribed, i

rotatable means to operate on an object, actuating means operably connected with said rections, control means arranged to be operated when the rotatable means reaches the opposite limits of rotary movement, and

electromagnetic means controlling the actuating means and controlled by said control means to reverse the movement of the `rotatable means when it reaches a predetermined limit oi movement in one direction and to stop said rotatable means when it reaches its limit of movement in the opposite direction 3. Ina machine of the character described, means operable in one direction to operateon rotatably means :tor rotating it in opposite dian object and having a reverse movementrto reset said means, actuating means opel-ably connected with the lirstnamed means. control means oper-ably ,connected with thel first named means aml including portions adapted to contact at opposite limits of movement of the irstnamed means, manuallyY operable means controlling the actuating means to bring same into operation `for moving the firstnamed means in the direction to operate on the ob]ect, and electromagnetic means tion between said motor and each of said des vices including a clutch, control means operable with said devices, electromagnetic m v-ans controlled by saidcontrol means and controllin the motor and the clutches -for reversing the motor when either devicehas been operated to operate on the object so asto reset such device. open the clutch and stop the motor when said device has beenreset, and manuallv operable means controlling said electromagnetic means to selectively close either of said clutches and to thereby start the motor.

5. A machine ot' the character described` comprising tivo devices operable on an object,

a reversible electric motor, motor controlling means, operative connections between saidmotor and devices `including clutches, control means operable `with said "devices, selective manually operable means for closing the clutches and controlling said motor control ling means to start the motor and closethe corresponding clutch to operate eitherof said devices. and electromagnetic means controlled by said control means and controlling said inotor controlling means and the clutches Y.tc-r reversing the inotoi When either device has been operated to operate on the object, so as to reset seid device, open the corresponding clutch and stop the inotor when scid device hns been reset.

6. A inacliine ot the chezicter described coiiipiising` two devices 'for operating on an object, actuating ineens, manually operable ineens for selectively connecting said actuating` ineens with either o'j sei d devices to operate the selected dci/ice in opposite directionsl` :1nd control, ineens operable with said devices, and electromagnetic ineens controlled by the control ineens end controlling seid actiut'ng ineens to reverse the selected device after seine lies operated on the object und tor stopping said device when it lies been reset.

7. ln a pipe cutter :uid tlirender, :i pipe cutter, eV pipe tlireeder, a reversible electric inotor, operative connections between seid niotor und the cutter and tlireeder including; clutches, control ineens operable with 'the cutter, other control ineens operable With the pipe threader, nien-ns controlled by the firstneined control ineens and controlling the inotor and the clutch between tlie inotor and cutter for reversing the inotor when the cutter lies been Operated to cut the pipe so es to reset the cutter and openingr the clutch und stopping the inotor when the cutter has beenreset, and ineens controlled by the secondnamed control ineens and controlling the inotoi and the clutch between the inotor and threader for reversing the inotor when the thieader has been operated to thread the pipe so as to reset the tlireeder and opening the clutch and stopping tlie inotor when the t-liieader has been reset. Y

8. A pipe cutter and three-der comprising n pipe cutter,v :i pipetlireader, e reversible electric motor, motor controlling; ineens, op-

erative connections between seid inotcr und the pipe cutter and pipe threndei including,r clutches control ineens operable With the pipe cutter, other control ineens operable With the pipe tliieader, selective ineens for closing the clutches sind controlling seid inotor controllingineens to start the inotor :1nd close the corresponding clutch to operate either the pipe cutter or the pipe tlireeder, ineens controlled by the itii'stneined coi'itrol ineens and controlling seid niotoi' coiitrollinpl ineans and the clutch between the inotor and cutter for reversing the inotor when the cutter luis been operated to cut tbc pipe so fis to reset the cutter7 and opening; seid clutch end stopping' the inetci.' when the cutter hes been reset, and ineens controlled by the secondn nanied control ineens and controlling the niotor centroilinej ineens end tbc clutch between the inotoi' and thread er tor reversing` the inotor when the tlirender lies been operated to thread t-lie pipe so as to reset the threedcn end opening the lnsliianied clutch end stopping); the inctor when the tlncader luis been reset.

9. A pipe cutter end threader comprising n pipe cutter7 a pipe tlirender, actuating ineens, ineens for selectively connecting seid actuating nieens with either the pipe cutter or the pipe threedci' to operate seine in opposite directions, control ineens opernbie with the pipe cutter and the pipe threzider, and electromagnetic ineens controlled by seid control ineens and controlling seid. actuating; ineens to reverse the pipe cutter or the pipe threeder after seine hns operated on the pipe and for stopping the cutter or the tlireader when saine bes been reset.

ln testimony whereof We hereunto ziiiix our si gnatures.

GUY M. CAUSEY. MONROE E. MILLER. 

